THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
Effective: 01/01/08
7-15
ELEVATOR TRIM TAB RIGGING
A. Place the trim tab control lever in
cockpit in the neutral position.
B. Adjust push rods to position both the
aft fuselage and stabilizer bell cranks
in a center (neutral) position.
C. Place elevator in neutral position.
Adjust the length of push rod,
between the two bell crank
assemblies.
D. Tighten all bolts.
E. Loosen bolts attaching trim control
lever stop and adjust the stop to
provide proper trim tab travel. The
trim tab travel should be 8 (±1)
degrees up and 22 (±1) degrees
down.
*NOTE *
When measuring trim tab
travel, the elevator should
be in the neutral position.
F. Measure
free-play
of the tab at the
trim tab horn attaching point. The
total maximum free play should not
exceed 0.125-inch
EMPENNAGE
Ref. Figure 7-9
The vertical stabilizer, rudder, horizontal
stabilizer and elevators are constructed
of Alclad aluminum. All stabilizers are
connected to the fuselage structure by
bolts. The horizontal stabilizer is
supported by adjustable struts. Rudder
and elevators are attached to the
stabilizers by hinges containing sealed
bearings.
EMPENNAGE REMOVAL
A. Remove rudder and elevators from
stabilizers as outlined previously in
this section of the manual.
B. Remove horizontal struts, being sure
to mark left and right and top and
bottom.
C. Remove the vertical stabilizer by
removing the single forward bolt and
the 8 bolts attaching it to the tail post.
D. Remove the horizontal stabilizer by
removing the two forward and two aft
bolts attaching it to the forward and
aft fuselage attach brackets. Note
the bushing locations and the
number of washers added so that
horizontal stabilizer need not be re-
rigged when installed.
*NOTE *
It is recommended that
empennage attachment
hardware be replaced with
identical new hardware
whenever it is removed.
The forked ends of the
struts are torqued to align
with horizontal stab.
attachments. Movement of
the fork will require re-
torqueing as outlined in
the horizontal stabilizer
installation instructions
below.
EMPENNAGE INSTALLATION
Horizontal Stabilizer
Ref. Figures 7-9 & 7-10
A. Install
horizontal stabilizer with AN6-
46A bolts on forward attach points
with bushing (P/N 9040-018) (9/16”
long) between horizontal stabilizer
and forward fuselage attach fitting.
Place bushing (P/N 9040-108) (1 ¼”
long) between the aft stabilizer
attach fitting and the aft fuselage
attach fitting and install AN6-44A
bolts. Torque bolts to 350-380 inch-
pounds of torque. Check that the
cord line of the horizontal stabilizer is
-0.75º ± .25º (this means nose-down)
relative to the leveling longeron used
CAUTION
